No. He didn’t chose a target at all. He approved it.
The kamakazi defense was a formal plan, including the use of the civilian population, the Ketsu-go plan. It was expected to raise the butcher’s bill to the point we would have accepted less than an unconditional surrender.
A full Ketsu-go defense against an American invasion would perhaps not have taken 20 Japanese million lives (as one planner suggested might be the cost), but 10%, of that, not unlikely. The armed forces in Japan numbered around 2.5 million, with more in the occupied territories and islands. Thus the exhortation was for the willing sacrifice, in the defense of Yamato, of masses of civilians in addition to the military. The phrase gyokusai was often used in describing what would take place, “the breaking of the jewels/shattered jade”. That is, the sacrifice of the people, to ensure the survival of the Kokutai, the often referenced national polity.
Those numbers for the cost of the invasion of Home Islands are not part of the literature, by a factor on a whole bunch. See Giangreco’s book, or Frank’s, as referenced above.